Keysight B2961A/B2962A User’s Guide, Edition 3 3-27
Installation
Installing the Interlock Circuit
Installing the Interlock Circuit
The interlock circuit is a simple electric circuit, as shown in Figure 3-12. The circuit
electrically opens when an access door is opened, and closes when the door is
closed.
B2961A/B2962A cannot apply high voltages over 42 V when the Digital I/O
interlock terminal is open. To perform high voltage measurements, the
B2961A/B2962A interlock terminal must be connected to the interlock circuit
installed in the measurement environment such as the shielding box. The interlock
circuit is important and necessary to prevent electrical shock when the user touches
the measurement terminals.
WARNING Hazardous voltage, instrument maximum output voltage may appear at the
High Force, High Sense, and Guard terminals if the fixture cover is closed.
To prevent electrical shock, do not expose these lines.
Une tension dangereuse, une tension de sortie maximale de l'appareil peut
apparaître aux bornes High Force, High Sense et Guard si le couvercle de
l'équipement est fermé. Afin d’éviter toute décharge électrique, n’exposez pas
ces lignes.
Figure 3-12 Interlock Circuit
Requirements • LED (Keysight part number 1450-0641 or equivalent), 1 ea.
• Mechanical switch (Keysight N1254A-402 or equivalent), 2 ea.
• Resistor, 500 to 1 k (choose lower one to get higher output of LED), 1 ea.
Mechanical switches
Shielding box
LED
Access door
D-sub connector
Interlock circuit
B2961A/B2962A
Digital I/O
15, 19
14
17, 18
16
24, 25
Dsub cable
15, 19
22, 23
16, 17
24
14
Negative
Positive
or
22
R
R: 500 Ω to 1 kΩ
25
R
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